These flexible, premium economy 3-ring binders from Ring Binder Shop are built for versatility and toughness. Made from our signature durable polyethylene plastic that’s .035 mil thick, these ring binders are engineered to resist tearing and ripping at the seams. The slim profile and flexible plastic covers make them convenient and comfortable to carry in backpacks, tote bags or just on their own (especially for kids) ? eliminating bulky stiffness and weight of traditional ring binders. These ring binders have no inside pockets, and feature 1-inch pull-open round rings that can hold up to 175 sheets, making them ideal for school, work and home organization ? or as colorful storage for sheet music, card collections, photos and all kinds of crafting projects. They’re available in five vibrant color options. The round steel rings are engineered to hold tight, prevent gaping and stay aligned. Ring Binder Shop is committed to offering insanely durable office goods, and these binders deliver the toughness we’re known for at an economic rate that’s just right. We’re proudly made in the USA of US and imported parts, and a Woman-Owned Small Business.